Near infrared laser absorbing coating and method for using...

Details Near infrared laser absorbing coating and method for using... Near infrared laser absorbing coating and method for using...

G - Physics

03

C

G03C 1/73 (2006.01) B41M 5/24 (2006.01) B41M 5/46 (2006.01) G03C 7/00 (2006.01) G03F 3/10 (2006.01)

Patent

CA 2049362

A laser imaging material which can be effectively employed for color printing and proofing comprises a near infrared transparent support film which has a near infrared absorbing layer thereon. The absorbing layer contains at least one sensitizer which is absorbent at a desired near infrared laser output wavelength and a decomposable binder. Laser radiation at the desired wavelength which acts upon the absorbing sensitizer causes rapid partial decomposition of the binder into gaseous and non-gase- ous products. The rapid expansion of the heated gases causes ablation of inert materials from the surface of said layer onto a re- ceptor sheet thus producing an imaged film (i.e., the laser imaging donor material) and a color print or proof (i.e., the receptor sheet) of reversed sign to the imaged donor material.

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